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-rw-r--r--git-compat-util.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index 49d4029..c99cddc 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -474,6 +474,23 @@ static inline int skip_prefix(const char *str, const char *prefix,
}
/*
+ * Like skip_prefix, but promises never to read past "len" bytes of the input
+ * buffer, and returns the remaining number of bytes in "out" via "outlen".
+ */
+static inline int skip_prefix_mem(const char *buf, size_t len,
+ const char *prefix,
+ const char **out, size_t *outlen)
+{
+ size_t prefix_len = strlen(prefix);
+ if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) {
+ *out = buf + prefix_len;
+ *outlen = len - prefix_len;
+ return 1;
+ }
+ return 0;
+}
+
+/*
* If buf ends with suffix, return 1 and subtract the length of the suffix
* from *len. Otherwise, return 0 and leave *len untouched.
*/